2002年被称为千兆年,其实核心网络向千兆升级在2000年已经开始,但真正代表千兆应用的还是在客户端的千兆采用。在信息量成倍增长的时代,用户已经产生了对高带宽应用的明确需求,对网络的稳定性和性能提出了更高的要求。接入节点的增多、带宽密集型应用的发展和新型数据类型的出现,致使网络的传输瓶颈经常在工作组交换机、骨干网和服务器等环节产生。但如果网络主干升级至千兆,而服 Called Gigabit in 2002, in fact, the core network to Gigabit upgrade in 2000 has already begun, but the true representative of Gigabit applications or Gigabit client. In the era of double the amount of information, users have created a clear demand for high-bandwidth applications, and set higher requirements on network stability and performance. The increasing number of access nodes, the development of bandwidth-intensive applications and the emergence of new types of data have led to bottlenecks in network transmission often occurring in workgroup switches, backbone networks and servers. But if the network backbone upgrade to Gigabit, and service